2. He can break his strand of 10 blocks into 3 3 times 4. I think it is 74 blocks are needed.
It’s b since 3% times 250 equals 7.4 and 7.4 times 14 equals 105 so you add 105 to 250 and you get 355
23/6 as a mixed fraction is 3(5/6)
0.20/0.70 = 0.2857
28.6% chance
round the answer as needed.
I guess it’s A not sure tho
